CN114132225A - Power generation control system, power generation control method, and storage medium - Google Patents
Power generation control system, power generation control method, and storage medium Download PDFInfo
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- CN114132225A CN114132225A CN202111023841.0A CN202111023841A CN114132225A CN 114132225 A CN114132225 A CN 114132225A CN 202111023841 A CN202111023841 A CN 202111023841A CN 114132225 A CN114132225 A CN 114132225A
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Images
Classifications
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- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04955—Shut-off or shut-down of fuel cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
- B60L58/31—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for starting of fuel cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
- B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
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- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
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- H01M8/04365—Temperature; Ambient temperature of other components of a fuel cell or fuel cell stacks
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- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
Abstract
Provided are a power generation control system, a power generation control method, and a storage medium, which can suppress the deterioration of a plurality of fuel cell systems as a whole. The power generation control system includes: a plurality of fuel cell systems mounted on an electric device operated by electric power; a battery mounted on the electric device; and a control device that controls the fuel cell systems based on the states of the plurality of fuel cell systems, the state of the battery, and the required power of the plurality of fuel cell systems.
Description
Technical Field
The invention relates to a power generation control system, a power generation control method, and a storage medium.
Background
Conventionally, as a technique related to a fuel cell system mounted on a vehicle, a technique has been known in which a required power is calculated based on an accelerator depression amount, a temperature of a secondary battery, and a storage amount, and power generation of the fuel cell system is controlled based on the calculated required power (see, for example, japanese patent laid-open No. 2016 and 103460).
Disclosure of Invention
However, control in a case where a plurality of fuel cell systems are mounted on a vehicle is not considered. Therefore, depending on the manner of execution of the control, the deterioration of each fuel cell system may be uneven.
The present invention has been made in view of such circumstances, and an object thereof is to provide a power generation control system, a power generation control method, and a storage medium that can suppress deterioration of the entire plurality of fuel cell systems.
In order to solve the above problems and achieve the related object, the present invention adopts the following configuration.
(1): a power generation control system according to an aspect of the present invention includes: a plurality of fuel cell systems mounted on an electric device that operates by electric power; a battery mounted on the electric device; and a control device that controls each of the plurality of fuel cell systems based on a state of the plurality of fuel cell systems, a state of the battery, and required power of the plurality of fuel cell systems.
(2): in addition to the aspect (1), the control device may determine a fuel cell system that operates among the plurality of fuel cell systems, based on a result of comparing the required power with a threshold value.
(3): in addition to the aspect (2), the controller may determine a fuel cell system that is to be stopped among the plurality of fuel cell systems, when the required power is smaller than the threshold as a result of comparing the required power with the threshold.
(4): in the aspect (1) described above, the control device may determine the fuel cell system that operates among the plurality of fuel cell systems, based on a result of comparing a state of the battery with a threshold value.
(5): in the aspect (4) described above, the control device may determine the fuel cell system to be stopped among the plurality Of fuel cell systems when a result Of comparing the State Of the battery with the threshold value is that a battery State Of Charge (State Of Charge), which is the State Of the battery, is greater than the threshold value.
(6): in the aspect (1) described above, the control device may determine a fuel cell system that is to be operated or stopped among the plurality of fuel cell systems, based on both the required power and a state of the battery.
(7): in addition to the aspect (2) or (3), the control device may select the fuel cell system of the plurality of fuel cell systems that is to be operated, based on a result of comparing the power generation time of each of the plurality of fuel cell systems with a threshold value.
(8): in the aspect (7) described above, the control device may select the fuel cell system to be stopped, from among the plurality of fuel cell systems whose power generation time is equal to or longer than the threshold value as a result of comparing the power generation time of each of the plurality of fuel cell systems with the threshold value.
(9): in addition to the aspect (2) or (3), the control device may select the fuel cell system of the plurality of fuel cell systems that is to be operated, based on a result of comparing the temperatures of the plurality of fuel cell systems with a threshold value.
(10): in the aspect (9) described above, the control device may select a fuel cell system that is to be stopped from among the plurality of fuel cell systems when a result of comparing the temperatures of the plurality of fuel cell systems with the threshold value is that the temperature is equal to or higher than the threshold value.
(11): in addition to the aspect (1), the control device may select the fuel cell system that is to be operated or stopped from among the plurality of fuel cell systems, based on a result of comparing a charging rate of the fuel cell included in the plurality of fuel cell systems with a threshold value.
(12): a power generation control method according to an aspect of the present invention causes a computer to perform: the plurality of fuel cell systems are controlled based on the states of the plurality of fuel cell systems mounted on an electrically powered device that operates by electric power, the state of a battery mounted on the electrically powered device, and the required electric power of the plurality of fuel cell systems.
(13): a storage medium according to an aspect of the present invention stores a program for causing a computer to perform: the plurality of fuel cell systems are controlled based on the states of the plurality of fuel cell systems mounted on an electrically powered device that operates by electric power, the state of a battery mounted on the electrically powered device, and the required electric power of the plurality of fuel cell systems.
According to the aspects (1) to (13), deterioration of the entire plurality of fuel cell systems can be suppressed.
Drawings
Fig. 1 is a diagram showing an example of a schematic configuration of an electric vehicle according to an embodiment.
Fig. 2 is a block diagram showing an example of a configuration including a unit according to the embodiment.
Fig. 3 is a diagram showing an example of the configuration of the fuel cell system of the embodiment.
Fig. 4 is a block diagram showing an example of the configuration of the control unit according to the embodiment.
Fig. 5 is a block diagram showing an example of the structure of the ECU according to the embodiment.
Fig. 6 is a diagram showing an example of the time change of the system required power and the battery SOC in the first control example of the embodiment.
Fig. 7 is a flowchart showing an example of the processing procedure of the ECU in the first control example of the embodiment.
Fig. 8 is a diagram showing an example of the system required power and the temporal change in the battery SOC in the second control example of the embodiment.
Fig. 9 is a flowchart showing an example of the processing procedure of the ECU in the second control example of the embodiment.
Fig. 10 is a diagram for explaining a first modification.
Fig. 11 is a diagram for explaining a second modification.
Fig. 12 is a flowchart showing an example of the processing procedure of the ECU in the second modification of the embodiment.
Fig. 13 is a diagram showing an example of information stored in the storage unit according to the embodiment.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings. Hereinafter, an example in which the power generation control system is mounted on the electric vehicle will be described. The electrically powered vehicle is, for example, a fuel cell vehicle that uses electric power generated in a fuel cell as electric power for traveling or electric power for operation of an in-vehicle device. The electric vehicle is an example of an electric device that operates by electric power, and is a two-wheel, three-wheel, four-wheel, or other vehicle. The electrically powered vehicle may be a large vehicle such as a bus or a truck on which a plurality of fuel cell systems described later can be mounted. The power generation control system may be mounted on an electric device other than an electric vehicle (for example, a ship, a flying object, or a robot), or may be mounted on a stationary fuel cell system.
[ electric vehicle ]
Fig. 1 is a diagram showing an example of a schematic configuration of an electric vehicle 1 according to the present embodiment. As shown in fig. 1, the electric vehicle 1 includes a cab 2, a transmission 3, a unit 4A, a unit 4B, a shaft 5, a frame 6, and wheels 7.
The cab 2 is a portion including a driver's seat and the like. The transmission 3 is a transmission. The units 4A, 4B include a fuel cell system. In the following description, when one of the cells 4A and 4B is not specified, it is referred to as a cell 4. The shaft 5 is, for example, a propeller shaft, and is a member that connects the transmission 3 to a gear connected to the wheel 7. The schematic configuration of the electric vehicle 1 shown in fig. 1 is an example, and the configuration is not limited to this. For example, the number of the cells 4 is not limited to two, and may be one or more.
[ Unit ]
Next, a configuration example of the cell 4 will be described. Fig. 2 is a block diagram showing an example of the configuration of the unit 4 according to the present embodiment. As shown in fig. 2, the unit 4A includes a fuel cell system 200A, a fuel cell system 200B, BATVCU34A, a converter 32A, a motor 12A, DCDC, a converter 45A, an auxiliary device 46A, and a battery 40A. The unit 4B includes a fuel cell system 200C, a fuel cell system 200D, BATVCU34B, a converter 32B, a motor 12B, DCDC, a converter 45B, an auxiliary device 46B, and a battery 40B.
The units 4A, 4B are connected to the ECU 100. ECU100 is connected to storage unit 150. The ECU100 is an example of a control device or a control unit.
The fuel cell system 200A includes a BATVCU244A, a fuel cell 201A, and an a/P202A. The fuel cell system 200B includes a BATVCU244B, a fuel cell 201B, and an a/P202B. The fuel cell system 200C includes a BATVCU244C, a fuel cell 201C, and an A/P202C. The fuel cell system 200D includes the BATVCU244D, the fuel cell 201D, and the a/P202D.
In the following description, one of the fuel cell systems 200A, 200B, 200C, and 200D is referred to as a fuel cell system 200 unless otherwise specified. Without specifying one of the BATVCUs 34A and 34B, it is referred to as BATVCU 34. When one of the motors 12A and 12B is not specified, it is referred to as a motor 12. When one of the control units 80A and 80B is not specified, it is referred to as a control unit 80. When one of the DCDC converter 45A and the DCDC converter 45B is not specified, it is referred to as a DCDC converter 45. When one of the slave 46A and the slave 46B is not specified, it is referred to as a slave 46. When one of the batteries 40A and 40B is not specified, it is referred to as a battery 40. Without specifying one of the BATVCUs 244A, 244B, 244C, and 244D, it is referred to as the BATVCU 244. When one of the fuel cells 201A, 201B, 201C, and 201D is not specified, it is referred to as a fuel cell 201. Without specifying one A/P of A/P202A, A/P202B, A/P202C, and A/P202D, it is referred to as A/P202.
The batvcu (fuel Cell Voltage Control unit)244 is, for example, a boost-type DC-DC (direct current-direct current) converter that boosts the Voltage of the fuel Cell 201. The fuel cell 201 is an energy source using hydrogen as power generation energy, for example. A/P202 is an air pump. A detailed configuration example of the fuel cell system 200 will be described later.
The battery 40 is an energy source, and is a battery capable of repeating charge and discharge, such as a nickel-metal hydride battery, a lithium ion secondary battery, or a sodium ion battery. The battery 40 includes a battery sensor that detects a current value, a voltage value, and a temperature of the battery 40. The battery 40 may be connected to an external charging device, for example, to charge the electric power supplied from the charging/discharging device.
The battcu (battery Voltage Control unit)34 is, for example, a boost DC-DC converter. The BATVCU34 boosts the dc voltage supplied from the battery 40 and supplies the boosted dc voltage to the converter 32. The BATVCU34 outputs the regenerative voltage supplied from the motor 12 or the electric power supplied from the fuel cell system 200 to the battery 40.
The DCDC converter 45 performs dc-dc conversion. The DCDC converter 45 converts the dc voltage output from the battery 40 into a 12V dc voltage, for example.
The auxiliary machine 46 is another on-vehicle device or the like, and includes, for example, a vehicle sensor 461 (vehicle sensors 461A and 461B), a brake device 462 (brake devices 462A and 462B), and the like. The vehicle sensors 461 may include an acceleration sensor that detects acceleration of the electric vehicle 1, a yaw rate sensor that detects an angular rate about a vertical axis, an orientation sensor that detects a direction of the electric vehicle 1, and the like. The vehicle sensor 461 may also include a position sensor that detects the position of the electric vehicle 1. The position sensor acquires position information of the electric vehicle 1 from, for example, a receiver of a gnss (global Navigation Satellite system) or a receiver of a gps (global Positioning system) mounted on the electric vehicle 1. The vehicle sensors 461 may also include temperature sensors that measure the temperature of the fuel cell system 200.
The ecu (electronic Control unit)100 controls each of the plurality of fuel cell systems 200 based on, for example, the state of the plurality of fuel cell systems 200, the state of the battery 40, and the required power of the plurality of fuel cell systems 200. The ECU100 compares the required electric power with a threshold value stored in the storage unit 150, for example, and controls each of the plurality of fuel cell systems 200 based on the result of the comparison. ECU100 compares the state of battery 40 with the threshold value in storage unit 150, and controls each of the plurality of fuel cell systems 200 based on the result of comparison. An example of the control method will be described later. The ECU100 controls the converter 32A, the motor 12A, the converter 32B, and the motor 12B. The unit 4A may include a control unit 80A (80, not shown), and the unit 4B may include a control unit 80B (80, not shown). In this case, the control unit of the unit 4A may control the converter 32A and the motor 12A according to the control of the ECU 100. The control unit of the unit 4B may control the converter 32B and the motor 12A according to the control of the ECU 100.
The storage unit 150 stores, for example, various thresholds used by the ECU100 in control, programs used by the ECU100 in control, and the like. The storage unit 150 is implemented by, for example, an hdd (hard Disk drive), a flash Memory, an EEPROM (Electrically Erasable Programmable Read Only Memory), a rom (Read Only Memory), or a ram (random Access Memory).
The ECU100 is realized by executing a program (software) by a hardware processor such as a cpu (central Processing unit). Some or all of these components may be realized by hardware (including circuit units) such as lsi (large Scale integration), asic (application Specific Integrated circuit), FPGA (Field-Programmable Gate Array), and gpu (graphics Processing unit), or may be realized by cooperation between software and hardware. The program may be stored in advance in a storage device (a storage device including a non-transitory storage medium) such as an HDD or a flash memory of the electric vehicle 1, or may be stored in a removable storage medium such as a DVD or a CD-ROM, and mounted on the drive device via the storage medium (the non-transitory storage medium) to, for example, an HDD or a flash memory as the storage unit 150.
[ Fuel cell System ]
Here, a configuration example of the fuel cell system 200 will be described. Fig. 3 is a diagram showing an example of the structure of the fuel cell system 200 according to the present embodiment. As shown in fig. 3, the fuel cell system 200 includes, for example, a fuel cell stack 210, a compressor 214, a seal inlet valve 216, a humidifier 218, a gas-liquid separator 220, an exhaust circulation pump (P)222, a hydrogen tank 226, a hydrogen supply valve 228, a hydrogen circulation unit 230, a gas-liquid separator 232, a temperature sensor (T)240, a contactor 242, an FCVCU244, a fuel cell control device 246, and a fuel cell cooling system 280. The configuration of fig. 3 is an example, and the configuration of the fuel cell system 200 is not limited to this.
The compressor 214 includes a motor or the like driven and controlled by the fuel cell control device 246, takes in air from the outside by the driving force of the motor and compresses the air, and feeds the compressed air to the oxidizing gas supply path 250 connected to the cathode 210B, thereby pressurizing and feeding the oxidizing gas to the fuel cell.
The seal inlet valve 216 is provided in an oxidizing gas supply passage 250 that connects the compressor 214 to a cathode supply port 212a that can supply air to the cathode 210B of the fuel cell stack 210, and is opened and closed under the control of the fuel cell control device 246.
The humidifier 218 humidifies the air sent from the compressor 214 to the oxidizing gas supply passage 250. For example, the humidifier 218 includes a water permeable membrane such as a hollow fiber membrane, and humidifies the air by adding moisture to the air by bringing the air from the compressor 214 into contact with the water permeable membrane.
The gas-liquid separator 220 discharges the cathode off-gas and the liquid water discharged from the cathode discharge port 212B to the oxidizing gas discharge passage 252 without being consumed by the cathode 210B to the atmosphere via the cathode exhaust passage 262. The gas-liquid separator 220 may separate the liquid water from the cathode off-gas discharged to the oxidizing gas discharge passage 252, and may flow only the separated cathode off-gas into the exhaust gas recirculation passage 254.
The exhaust circulation pump 222 is provided in the exhaust recirculation passage 254, mixes the cathode off-gas flowing from the gas-liquid separator 220 into the exhaust recirculation passage 254 with the air flowing through the oxidizing gas supply passage 250 from the seal inlet valve 216 toward the cathode supply port 212a, and supplies the mixed gas to the cathode 210B again.
The hydrogen tank 226 stores hydrogen in a compressed state. The hydrogen supply valve 228 is provided in a fuel gas supply passage 256 that connects the hydrogen tank 226 to an anode supply port 212c that can supply hydrogen to the anode 210A of the fuel cell stack 210. The hydrogen supply valve 228 supplies the hydrogen stored in the hydrogen tank 226 to the fuel gas supply passage 256 when the valve is opened by the control of the fuel cell control device 246.
The hydrogen circulation unit 230 is, for example, a pump that circulates and supplies the fuel gas to the fuel cell 201. The hydrogen circulation unit 230 circulates the anode off gas discharged from the anode outlet 212d to the fuel gas discharge passage 258 without being consumed by the anode 210A, for example, to the fuel gas supply passage 256 flowing into the gas-liquid separator 232.
The gas-liquid separator 232 separates the liquid water from the anode off-gas circulated from the fuel gas discharge passage 258 to the fuel gas supply passage 256 by the action of the hydrogen circulation unit 230. The gas-liquid separator 232 supplies the anode off-gas separated from the liquid water to the anode supply port 212c of the fuel cell stack 210. The liquid water discharged to the gas-liquid separator 232 is discharged to the atmosphere via a discharge pipe 264.
The temperature sensor 240 detects the temperatures of the anode 210A and the cathode 210B of the fuel cell stack 210, and outputs a detection signal (temperature information) to the fuel cell control device 246.
The contactor 242 is disposed between the anodes 210A and FCVCU244 of the fuel cell stack 210 and between the cathodes 210B and FCVCU244 of the fuel cell stack 210. The contactor 242 electrically connects or disconnects the fuel cell stack 210 to the FCVCU244 based on control from the fuel cell control device 246.
FCVCU244 is disposed between anode 210A of fuel cell stack 210 passing through contactor 242 and the electrical load, and between cathode 210B of fuel cell stack 210 passing through contactor 242 and the electrical load. FCVCU244 boosts the voltage of output terminal 248 connected to the electrical load side to a target voltage determined by fuel cell control device 246. The FCVCU244 boosts the voltage output from the fuel cell stack 210 to a target voltage, for example, and outputs the boosted voltage to the output terminal 248.
The fuel cell control device 246 controls the start and end of power generation, the amount of power generation, and the like in the fuel cell system 200 in accordance with power generation control performed by the ECU 100. The fuel cell control device 246 performs control related to temperature adjustment of the fuel cell system 200 using the fuel cell cooling system 280. The fuel cell control device 246 may be replaced with a control device such as an FC-ECU. Further, the fuel cell control device 246 may perform power generation control of the electric vehicle 1 in cooperation with the ECU 100.
The fuel cell cooling system 280 cools the fuel cell system 200, for example, when the temperature of the fuel cell stack 210 detected by the temperature sensor 240 is equal to or higher than a predetermined threshold value, in accordance with the control performed by the fuel cell controller 246. For example, the fuel cell cooling system 280 cools the temperature of the fuel cell stack 210 by circulating a cooling medium through a flow path provided in the fuel cell stack 210 to discharge heat of the fuel cell stack 210. The fuel cell cooling system 280 may control the heating or cooling of the fuel cell stack 210 so that the temperature obtained by the temperature sensor 240 is maintained within a predetermined temperature range when the fuel cell system 200 is generating power.
[ control device ]
Next, when the units 4A and 4B include the control unit 80(80A and 80B), a configuration example of the control unit 80 will be described. Fig. 4 is a block diagram showing an example of the configuration of the control unit 80 according to the present embodiment. The control unit 80 includes, for example, a motor control unit 82, a brake control unit 84, a power control unit 86, and a travel control unit 88. If the control unit 80 is not provided, the ECU100 performs the following control.
The motor control unit 82 calculates a driving force required for the motor 12 based on the output of the vehicle sensor 461, and controls the motor 12 to output the calculated driving force.
The brake control unit 84 calculates a braking force required for the brake device 462 based on the output of the vehicle sensor 461, and controls the brake device 462 to output the calculated braking force.
The electric power control unit 86 manages the state of charge (the state of charge) of the battery 40. For example, the power control unit 86 calculates the SOC (State Of Charge) Of the battery 40 based on the output Of a battery sensor provided in the battery 40. For example, when the SOC of the battery 40 is smaller than a predetermined value, the power control unit 86 executes control for charging the battery 40 by power generation of the fuel cell system 200 or reports information urging the passenger to charge by power supply from an external charging device. The electric power control unit 86 may perform control for stopping the charging control when the SOC of the battery 40 is larger than a predetermined value, or consuming the surplus electric power generated by the fuel cell system 200 by using an auxiliary machine or the like.
The travel control unit 88 performs driving control of the electric vehicle 1 based on information acquired by the vehicle sensor 461, for example. The travel control unit 88 may execute the driving control of the electric vehicle 1 based on information obtained from a monitoring unit (not shown) in addition to the information obtained from the vehicle sensor 461. The monitoring unit includes, for example, a camera that images a space outside the electric vehicle 1, a radar or lidar (light Detection and ranging) that has the outside of the electric vehicle 1 as a Detection range, an object recognition device that performs sensor fusion processing based on the output of the radar and lidar, and the like. The monitoring unit estimates the type of an object (particularly, a vehicle, a pedestrian, and a bicycle) present in the periphery of the electric vehicle 1, and outputs the type of the object to the travel control unit 88 together with information on the position and speed thereof. The driving control is to cause the electric vehicle 1 to travel by controlling one or both of steering and acceleration/deceleration of the electric vehicle 1, for example.
[ECU]
Next, a configuration example of the ECU100 is explained. Fig. 5 is a block diagram showing an example of the configuration of the ECU100 according to the present embodiment. As shown in fig. 5, the ECU100 includes a fuel cell state acquisition unit 101, a battery state acquisition unit 102, a temperature acquisition unit 103, a comparison unit 104, and a power generation control unit 105.
The fuel cell state acquisition unit 101 acquires information on the state of each fuel cell system 200.
The battery state acquisition unit 102 acquires information related to the state of the battery 40.
The temperature acquisition unit 103 acquires information related to the temperature of the fuel cell system 200.
The power generation control unit 105 calculates the required amount of electric power required for the battery 40 and the fuel cell system 200 based on the output of the vehicle sensor 461. For example, the power generation control unit 105 calculates a torque to be output by the motor 12 based on the accelerator opening and the vehicle speed, and calculates the required power amount by summing the drive shaft load power obtained from the torque and the rotation speed of the motor 12 and the power required by the auxiliary device 46 and the like. For example, the power control unit 86 calculates the SOC of the battery 40 based on the output of a battery sensor provided in the battery 40. The power generation control unit 105 may acquire SOC information from the control unit 80. The power generation control unit 105 controls the plurality of fuel cell systems 200 to be in the on state or the off state, respectively, based on the result of comparison by the comparison unit 104. The control unit 80 may execute a part of the processing performed by the power generation control unit 105.
[ first control example ]
Next, a first control example is explained. In the first control, when the electrically powered vehicle 1 is in an idling state, for example, the ECU100 controls each of the plurality of fuel cell systems in accordance with the SOC. Fig. 6 is a diagram showing an example of the time change of the system required power and the battery SOC in the first control example of the present embodiment. In fig. 6, the horizontal axis represents time [ s ]. The vertical axis of the line g11 represents the SOC value, and the line g11 represents the change in the battery SOC with respect to time. The vertical axis may also be the voltage value [ V ]. The vertical axis of the line g12 represents the power value [ W ], and the line g12 represents the change in the system required power with respect to time. Dashed line g21 represents the first threshold (SOC15) and dashed line g22 represents the second threshold (SOC 13). The first threshold value is a power generation stop execution threshold value, and the second threshold value is a power generation stop release threshold value. The magnitude relation of the required power is W11 < W12 < W13 < W14. The size relation of the SOC is SOC11 < SOC12 < SOC13 < SOC14 < SOC 15.
During the period from time t0 to time t11, the generated power generated by the plurality of fuel cell systems 200 is lower than the consumed power consumed by the load of the electric vehicle 1, and therefore the SOC of the battery 40 rises from the SOC11 to the SOC 15. The required power during this period is W13. Since the SOC is equal to or less than the first threshold value (g21), the ECU100 controls all of the four fuel cell systems 200(200A, 200B, 200C, 200D) to the on state (operating state).
During the period from time t11 to t12, the SOC has reached the first threshold value, and therefore the battery 40 is no longer able to be charged. Therefore, the ECU100 controls to stop the load. Further, since the required electric power is maintained at W13, the ECU100 controls two of the four fuel cell systems 200 to the off state (stopped state) and controls two to the on state. In this example, an example in which two fuel cell systems 200 are stopped is described, but one or more stopped fuel cell systems 200 may be used. By this control, the SOC falls from SOC15 to SOC 13.
Since the SOC reaches the second threshold value and the required power is W13 during the period from time t12 to time t13, ECU100 turns on two stopped fuel cell systems 200 and controls all four fuel cell systems 200 to the on state. By this control, the SOC rises from SOC13 to SOC 15.
At time t13, the load decreases and the required power decreases from W13 to W11. During the period from time t13 to t14, the required electric power decreases, and therefore the ECU100 controls all of the four fuel cell systems 200 to the off state. By this control, the SOC is lowered from SOC15 to SOC 14.
During the period from time t14 to time t15, the load changes and the required power increases from W11 to W12 that is smaller than W13 and larger than W11, but since the SOC of the ECU100 is equal to or greater than the second threshold, control is continued to bring all of the four fuel cell systems 200 into the off state. By this control, the SOC falls from SOC14 to SOC 13.
At time t15, the required power rises from W12 to W14, which is greater than W13. During the period from time t15 to t16, the required power rises, and therefore the ECU100 controls all of the four fuel cell systems 200 to the on state. By this control, the SOC falls from SOC13 to SOC 12.
In this way, after the SOC reaches the first threshold value, the ECU100 controls one or more fuel cell systems 200 to be in the off state. When the SOC is equal to or lower than the first threshold value and equal to or higher than the second threshold value, the ECU100 continues the shutdown state of the fuel cell system 200. The first threshold and the second threshold have hysteresis (hystersis). When the SOC is less than the second threshold value, ECU100 controls all fuel cell systems 200 to be in the on state. A predetermined power generation region is defined between the first threshold value and the second threshold value.
Next, an example of the processing procedure of the ECU100 will be described. Fig. 7 is a flowchart showing an example of the processing procedure of the ECU100 in the first control example of the present embodiment. At the start of the process, the four fuel cell systems 200 operate (on state).
The fuel cell state acquisition unit 101 acquires information on the state of each fuel cell system 200 (step S11). The battery state acquisition unit 102 acquires information on the battery 40 (step S12).
The power generation control unit 105 calculates the SOC of the battery 40 based on the output of the battery sensor provided in the battery 40 (step S13).
When determining that the SOC is smaller than the first threshold value (no in step S15), power generation control unit 105 determines whether or not the SOC is equal to or greater than a second threshold value (step S17). When determining that the SOC is equal to or greater than the second threshold value (yes in step S17), power generation control unit 105 proceeds to the process of step S16.
When it is determined that the SOC is equal to or greater than the first threshold value (yes in step S15) or when it is determined that the SOC is equal to or greater than the second threshold value (yes in step S17), power generation control unit 105 controls one or more fuel cell systems 200 to be stopped (in an off state) (step S16). After the processing, the power generation control unit 105 returns to the processing of step S11.
When it is determined that the SOC is smaller than the second threshold value (no in step S17), power generation control unit 105 operates all fuel cell systems 200 (on state) (step S18). After the processing, the power generation control unit 105 returns the processing to step S11.
In the process of fig. 7, the ECU100 may maintain or change the control state of the fuel cell system 200 based on an increase or decrease in the required power as shown in fig. 6. That is, the ECU100 may select the fuel cell system that operates among the plurality of fuel cell systems based on both the required electric power and the state of the battery 40. In this case, for example, the ECU100 may calculate an integral obtained based on the required power and the state of the battery 40, and select the fuel cell system to be operated from among the plurality of fuel cell systems based on the calculated integral.
[ second control example ]
Next, a second control example is explained. In the second control, when the electric vehicle 1 is in an idle state, for example, the ECU100 controls each of the plurality of fuel cell systems in accordance with the required electric power. Fig. 8 is a diagram showing an example of the time change of the system required power and the battery SOC in the second control example of the present embodiment. In fig. 8, the horizontal axis represents time [ s ]. The vertical axis of the line g13 represents SOC, and the line g13 represents change in battery SOC with respect to time. The vertical axis may also be the voltage value [ V ]. The vertical axis of the line g14 represents the power value [ W ], and the line g14 represents the change in the system required power with respect to time. The broken line g23 represents the third threshold (W25), and the broken line g24 represents the fourth threshold (W23). The third threshold is a power generation stop release threshold, and the fourth threshold is a power generation stop execution threshold. The magnitude relation of the required power is W21 < W22 < W23 < W24 < W25 < W26 < W27. The magnitude relation of the SOC is SOC21 < SOC22 < SOC23 < SOC 24.
During the period from time t0 to time t21, the generated power generated by the plurality of fuel cell systems 200 is lower than the consumed power consumed by the load of the electric vehicle 1, and therefore the SOC of the battery 40 rises from the SOC21 to the SOC 23. The required power during this period is W26. Since the required electric power is equal to or higher than the third threshold value (g23), the ECU100 controls all of the four fuel cell systems 200 to the on state (operating state).
At time t21, the required power drops from W26 to W23, which is smaller than W26. During the period from time t21 to t23, the required power is smaller than the fourth threshold value (g24), and therefore the ECU100 controls two of the four fuel cell systems 200 to the off state (stopped state) and controls two to the on state. In this example, an example in which two fuel cell systems 200 are stopped is described, but one or more stopped fuel cell systems 200 may be used. By this control, the SOC rises from SOC23 to SOC 24.
At time t23, the required power drops from W23 to W21, which is smaller than W23. During the period from time t23 to t24, the required power is smaller than the fourth threshold value (g24), so the ECU100 continues to be set to a state in which two of the four fuel cell systems 200 are controlled to the off state (stopped state) and two are controlled to the on state. By this control, the SOC is maintained at SOC 24.
At time t24, the requested power rises from W21 to W24 which is smaller than W26 and larger than W23. During the period from time t24 to t25, the required power is equal to or greater than the fourth threshold value (g24) and equal to or less than the third threshold value, so the ECU100 continues to be set to a state in which two of the four fuel cell systems 200 are controlled to the off state (stopped state) and two are controlled to the on state. By this control, the SOC falls from SOC24 to SOC 23.
At time t25, the required power rises from W24 to W27, which is greater than W26. During the period from time t25 to t26, the required power is larger than the third threshold value (g23), and therefore the ECU100 controls all of the four fuel cell systems 200 to the on state. By this control, the SOC falls from SOC23 to SOC 22.
In this way, when the required electric power becomes equal to or less than the third threshold value, the ECU100 controls one or more fuel cell systems 200 to be in the off state. When the required electric energy is equal to or less than the third threshold value and equal to or more than the fourth threshold value, the ECU100 continues the shutdown state of the fuel cell system 200. The third threshold and the fourth threshold have hysteresis. When the required electric power is less than the fourth threshold value, the ECU100 controls all the fuel cell systems 200 to be in the on state. A predetermined power generation region is defined between the third threshold value and the fourth threshold value.
Next, an example of the processing procedure of the ECU100 will be described. Fig. 9 is a flowchart showing an example of the processing procedure of the ECU100 in the second control example of the present embodiment. At the start of the process, the four fuel cell systems 200 operate (on state). The same processing as in the first control is denoted by the same reference numerals, and description thereof is omitted.
The ECU100 performs the processing of steps S11 to S12.
The power generation control unit 105 calculates the required amount of electric power required for the battery 40 and the fuel cell system 200 based on the output of the vehicle sensor 461 (step S101). The power generation control unit 105 calculates the SOC of the battery 40 based on the output of the battery sensor provided in the battery 40 (step S13).
The comparison unit 104 compares the calculated required power with the third threshold value and the fourth threshold value stored in the storage unit 150 (step S102). The power generation control unit 105 determines whether or not the required power is smaller than a third threshold value as a result of the comparison by the comparison unit 104 (step S103).
When it is determined that the required power is equal to or greater than the third threshold (no in step S103), the power generation control unit 105 determines whether or not the required power is equal to or greater than a fourth threshold as a result of comparison by the comparison unit 104 (step S105). When it is determined that the required power is equal to or higher than the fourth threshold (yes in step S105), the power generation control unit 105 proceeds to the process of step S104.
When it is determined that the required power is smaller than the third threshold value (yes in step S103), or when it is determined that the required power is equal to or larger than the fourth threshold value (yes in step S105), the power generation control unit 105 controls one or more fuel cell systems 200 to be stopped (in an off state) (step S104). The power generation control unit 105 returns to the process of step S11.
When it is determined that the required power is smaller than the fourth threshold (no in step S105), the power generation control unit 105 operates all the fuel cell systems 200 (on state) (step S106). After the processing, the power generation control unit 105 returns the processing to step S11.
In the process of fig. 9, the ECU100 may also select a fuel cell system to be operated from among the plurality of fuel cell systems based on both the required power and the state of the battery 40. In this case, for example, the ECU100 may calculate an integral obtained based on the required power and the state of the battery 40, and select the fuel cell system to be operated from among the plurality of fuel cell systems based on the calculated integral.
[ first modification ]
Here, a first modification will be described. In the first control and the second control, an example in which two of the four fuel cell systems 200 are brought into an off state when a predetermined condition is satisfied is described. In the first modification, an example of a method of setting the fuel cell system 200 to be in the on state or the off state based on the power generation time will be described.
During the period from time t21 to time t25 in fig. 8, the ECU100 may select two of the four at random or sequentially, or may select them in the order of the generation time as shown in fig. 10. Fig. 10 is a diagram for explaining a first modification. In fig. 10, the horizontal axis represents the number of the fuel cell system, and the vertical axis represents the power generation time [ (e.g., minutes) ]. The broken line g101 indicates a fifth threshold value (TIth) with respect to the power generation time. Reference numeral g111 denotes the power generation time of the first fuel cell system 200A, reference numeral g112 denotes the power generation time of the second fuel cell system 200B, reference numeral g113 denotes the power generation time of the third fuel cell system 200C, and reference numeral g114 denotes the power generation time of the fourth fuel cell system 200D.
In the example of fig. 10, the fuel cell systems in which the power generation time is equal to or longer than the fifth threshold value are the first fuel cell system 200A and the third fuel cell system 200C, and the fuel cell systems in which the power generation time is shorter than the fifth threshold value are the second fuel cell system 200B and the fourth fuel cell system 200D. The fifth threshold value may be obtained by, for example, averaging the power generation times of the plurality of fuel cell systems by the power generation control unit 105, or may be a value set in advance. In this case, during the period from time t21 to time t25, the ECU100 stops the first fuel cell system 200A and the third fuel cell system 200C having the power generation time equal to or longer than the fifth threshold value, and operates the second fuel cell system 200B and the fourth fuel cell system 200D having the power generation time shorter than the fifth threshold value.
In the above example, the fuel cell system 200 in which the power generation control unit 105 compares the fifth threshold value and selects the stop or the operation has been described, but the present invention is not limited to this. The power generation control unit 105 may sort the power generation times of the plurality of fuel cell systems 200 in the order of the power generation time being larger and the order of the priority or the order of the power generation time being smaller and the priority, may select the fuel cell system 200 to be stopped in the order of the power generation time being larger and the priority, or may select the fuel cell system 200 to be operated in the order of the power generation time being shorter and the priority. The power generation control unit 105 may select the fuel cell system 200 to be operated based on the result of comparison between the power generation time and the threshold value, or may select the fuel cell system 200 to be stopped based on the result of comparison between the power generation time and the threshold value.
Here, an example of the processing procedure of the ECU100 will be described with reference to fig. 9. The processing difference in fig. 9 is step S103.
The power generation control unit 105 selects the fuel cell system 200 to be stopped based on the power generation time (step S103). The calculation of the fifth threshold value and the comparison between the power generation time and the fifth threshold value are also performed by the power generation control unit 105, for example, in step S103.
In the above example, the first modification is applied to the second control, but the first modification may be applied to the first control.
[ second modification ]
Next, a second modification will be described. In the first control and the second control, an example in which two of the four fuel cell systems 200 are brought into an off state when a predetermined condition is satisfied is described. In the second modification, an example of a method of setting the fuel cell system 200 to be in the on state or the off state based on the temperature information of the fuel cell system 200 will be described.
The ECU100 may also select based on the result of comparing the temperature with the threshold value. Fig. 11 is a diagram for explaining a second modification. In fig. 11, the horizontal axis represents time [ s ]. The vertical axis of the line g13 represents SOC, and the line g13 represents change in battery SOC with respect to time. The vertical axis of the line g13 may also be the voltage value [ V ]. The vertical axis of the line g14 represents the power value [ W ], and the line g14 represents the change in the system required power with respect to time. The vertical axis of the broken line g41 is temperature [ deg. ] and the broken line g41 is the change in temperature of the fuel cell system 200 with respect to time. The broken line g42 represents the sixth threshold value (Tth).
The temperature of the fuel cell system 200 is, for example, the temperature detected by the temperature sensor 240 (fig. 3). The sixth threshold is a threshold for completing the warm-up (threshold for temperature) for completing the operation of the fuel cell system 200.
In the example of fig. 11, the change in the line g14 of the requested power and the change in the line g13 of the SOC are the same as those of fig. 8, but the operation of the fuel cell system 200 is not stopped because the temperature of the power generation control unit 105 during the period from time t0 to time t26 is less than the sixth threshold value. If the temperature becomes equal to or higher than the sixth threshold value after time t26, the operation of at least one fuel cell system 200 is stopped.
The temperature shown in fig. 11 is, for example, the average of the temperatures of the four fuel cell systems 200. The temperature may also be the temperature of each fuel cell system 200. In this case, it may be assumed that the power generation control unit 105 stops the operation of the fuel cell system 200 at a temperature equal to or higher than the sixth threshold value during the period from time t21 to time t 25. Alternatively, it may be assumed that, during the period from time t21 to time t25, the power generation control unit 105 stops the operations of the two fuel cell systems in the order in which the temperature is higher than or equal to the sixth threshold value in the fuel cell system 200.
Next, an example of the processing procedure of the ECU100 will be described. Fig. 12 is a flowchart showing an example of the processing procedure of the ECU100 in the second modification of the present embodiment. At the start of the process, the four fuel cell systems 200 operate (on state). The same processing as in the first control is denoted by the same reference numerals, and description thereof is omitted.
The ECU100 performs the processing of steps S11 to S12, S101, and S13.
The comparison unit 104 calculates, for example, an average value of the temperatures detected by the temperature sensors 240 of the plurality of fuel cell systems 200. The comparison unit 104 compares the average value of the temperatures with the sixth threshold value stored in the storage unit 150 (step S201). The power generation control unit 105 determines whether or not the average value of the temperatures is greater than the sixth threshold value as a result of the comparison by the comparison unit 104 (step S202).
When it is determined that the average value of the temperatures is greater than the sixth threshold value (yes in step S202), the power generation control unit 105 controls one or more fuel cell systems 200 to be stopped (in an off state) (step S203). After the processing, the power generation control unit 105 returns the processing to step S11.
When it is determined that the average value of the temperatures is not equal to or greater than the sixth threshold (no in step S202), the power generation control unit 105 controls all the fuel cell systems 200 to be in the operating state (step S204). After the processing, the power generation control unit 105 returns the processing to step S11. The average value of the temperature is compared with the threshold value and determined as described above, but the determination may be made based on the minimum value, the maximum value, and the like of the temperature in accordance with the characteristics of the system.
The second modification can be applied to the first control and the second control.
Not limited to the first modification and the second modification described above, the ECU100 may select the fuel cell system 200 to be stopped based on the operation time, the humidification state, the history of the fuel cell system 200 stopped last time, the use time of the ion exchange device, the deterioration of the fuel cell 201, and the like of the fuel cell system 200.
In the first control and the second control, even if the system required power becomes equal to or higher than the minimum generated power, the ECU100 may control not to immediately release the power generation stop when the battery SOC is high. The reason for this is that the SOC of the battery 40 is reduced by compensating for the electric power by the battery 40 until the predetermined SOC (seventh threshold value Soth) is reached. The seventh threshold value Soth is a threshold value corresponding to the battery 40, and is, for example, a value equal to or smaller than the specification value and larger than the first threshold value. When performing such processing, ECU100 may compare the SOC with a predetermined value of the SOC stored in storage unit 150, for example, in step S14 (fig. 7) or S102 (fig. 9). Further, for example, in step S15 (fig. 7) or S103 (fig. 9), the ECU100 may determine whether or not to stop the fuel cell system 200, taking into account the result of the comparison with the SOC.
[ example of information stored in the storage unit 150 ]
Here, an example of information stored in the storage unit 150 will be described. Fig. 13 is a diagram showing an example of information stored in the storage unit 150 according to the present embodiment. As shown in fig. 13, the storage unit 150 stores a first threshold value and a second threshold value relating to SOC, a third threshold value and a fourth threshold value relating to required power, a fifth threshold value for power generation time, a sixth threshold value relating to temperature, and a seventh threshold value relating to SOC (charging rate).
The threshold shown in fig. 13 is an example, and the storage unit 150 may store other thresholds.
According to the above embodiment, when the predetermined power generation region is reached, the power generation of the fuel cell system 200 can be stopped. According to the above-described embodiment, the stop state of the fuel cell system 200 can be changed in accordance with the required power. According to the above-described embodiment, the ECU100 can monitor the power generation state of the fuel cell system 200 to equalize the power generation frequency of the fuel cell system 200 (determine the operation/non-operation stack). According to the above embodiment, when the warm-up is not completed (for example, the system temperature is equal to or lower than a predetermined value), the control can be performed so that the stop of the power generation is not performed. According to the above-described embodiment, when the required power is lower than the minimum generated power (high potential power generation threshold or the like), the fuel cell system 200 can stop power generation. According to the above-described embodiment, the ECU100 can monitor the humidification, operation time, deterioration, temperature, ion exchanger use time, previous history, and the like of the fuel cell system 200, and switch the fuel cell system 200 in which power generation is stopped. According to the above-described embodiment, when the SOC of the battery 40 is high, it is possible to control not to immediately release the power generation stop when the system required power becomes equal to or higher than the minimum generated power.
As a result, according to the present embodiment, the power generation frequency (such as the operating time) of the mounted fuel cell system 200 can be made uniform, and therefore, the deterioration of the entire plurality of fuel cell systems can be suppressed. According to the present embodiment, the durability of the fuel cell system 200 and the constituent members of the fuel cell system 200 can be improved.
While the present invention has been described with reference to the embodiments, the present invention is not limited to the embodiments, and various modifications and substitutions can be made without departing from the scope of the present invention.
Claims (13)
1. A power generation control system, wherein,
the power generation control system includes:
a plurality of fuel cell systems mounted on an electric device that operates by electric power;
a battery mounted on the electric device; and
and a control device that controls each of the plurality of fuel cell systems based on a state of the plurality of fuel cell systems, a state of the battery, and required power of the plurality of fuel cell systems.
2. The power generation control system according to claim 1,
the control device determines a fuel cell system that operates among the plurality of fuel cell systems based on a result of comparing the required electric power with a threshold value.
3. The power generation control system according to claim 2,
the control device determines a fuel cell system that is to be stopped among the plurality of fuel cell systems when the required power is smaller than the threshold as a result of comparing the required power with the threshold.
4. The power generation control system according to claim 1,
the control device determines a fuel cell system that operates among the plurality of fuel cell systems based on a result of comparing a state of the battery with a threshold value.
5. The power generation control system according to claim 4,
the control device determines a fuel cell system to be stopped among the plurality of fuel cell systems when a battery state, that is, a battery state of the battery is equal to or greater than the threshold value as a result of comparing the battery state with the threshold value.
6. The power generation control system according to claim 1,
the control device determines a fuel cell system that is to be operated or stopped among the plurality of fuel cell systems, based on both the required electric power and a state of the battery.
7. The power generation control system according to claim 2 or 3,
the control device selects a fuel cell system that operates among the plurality of fuel cell systems based on a result of comparing the power generation time of each of the plurality of fuel cell systems with a threshold value.
8. The power generation control system according to claim 7,
the control device selects a fuel cell system to be stopped from among the plurality of fuel cell systems whose power generation time is equal to or longer than the threshold as a result of comparing the power generation time of each of the plurality of fuel cell systems with the threshold.
9. The power generation control system according to claim 2 or 3,
the control device selects an operating fuel cell system of the plurality of fuel cell systems based on a result of comparing the temperatures of the plurality of fuel cell systems with a threshold value.
10. The power generation control system according to claim 9,
the control device selects a fuel cell system among the plurality of fuel cell systems to be stopped when the temperature is equal to or higher than the threshold value as a result of comparing the temperatures of the plurality of fuel cell systems with the threshold value.
11. The power generation control system according to claim 1,
the control device selects a fuel cell system that operates or stops among the plurality of fuel cell systems based on a result of comparing the charging rates of the fuel cells included in the plurality of fuel cell systems with a threshold value.
12. A power generation control method, wherein,
the power generation control method causes a computer to perform:
the plurality of fuel cell systems are controlled based on the states of the plurality of fuel cell systems mounted on an electrically powered device that operates by electric power, the state of a battery mounted on the electrically powered device, and the required electric power of the plurality of fuel cell systems.
13. A storage medium storing a program, wherein,
the program causes a computer to perform the following processing:
the plurality of fuel cell systems are controlled based on the states of the plurality of fuel cell systems mounted on an electrically powered device that operates by electric power, the state of a battery mounted on the electrically powered device, and the required electric power of the plurality of fuel cell systems.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| JP2020149033A JP7179805B2 (en) | 2020-09-04 | 2020-09-04 | Power generation control system, power generation control method, and program |
| JP2020-149033 | 2020-09-04 |
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| CN114132225A true CN114132225A (en) | 2022-03-04 |
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| US (1) | US11637305B2 (en) |
| JP (1) | JP7179805B2 (en) |
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| US11094988B2 (en) * | 2017-12-31 | 2021-08-17 | Hyliion Inc. | Regenerative electrical power system with state of charge management in view of predicted and-or scheduled stopover auxiliary power requirements |
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- 2020-09-04 JP JP2020149033A patent/JP7179805B2/en active Active
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- 2021-08-23 US US17/408,558 patent/US11637305B2/en active Active
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- 2021-09-01 CN CN202111023841.0A patent/CN114132225A/en active Pending
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| US20220077481A1 (en) | 2022-03-10 |
| JP7179805B2 (en) | 2022-11-29 |
| JP2022043648A (en) | 2022-03-16 |
| US11637305B2 (en) | 2023-04-25 |
| DE102021122055A1 (en) | 2022-03-10 |
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